If you go with Blizzaks or a tire like them you will be fine in 12 inches of snow. Where I live we get around 300 inches (that's 25 feet) of snow each year from Lake superior lake effect so I know about winter driving. Stick with as narrow a tire as possible also. Now would be the time to be buying your winter tires as the prices will be less. I have 20's on my X now and have the 17's set up with blizzaks and ready for winter. Oh, by the way, had 24 degrees this past Saturday Morning (10 June) and had to scrape ice off the windshield!!!